Hard and Soft Water

The properties of water and its uses, depend on its mineral content. What minerals are found in water and how do they affect it? Chemistry - Periodic Table - Learning Points. Water contains dissolved mineral ions, such as sodium, calcium and magnesium. The presence of mineral ions in different concentrations makes water either hard or soft. Hard water is formed in limestone and chalk regions. Soft water is formed with igneous or sedimentary rocks. A Twig Context Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts in action in the real world.